After Princess Eugenie's engagement news was revealed to the world by her thrilled parents, official portraits of the happy couple were released to mark the occasion - and offer that all-important first glimpse of the bride-to-be's ring. The 27-year-old Princess' long-term boyfriend Jack Brooksbank, 31, popped the question in Nicaragua earlier this month with the unusual ring; a padparadscha sapphire surrounded by diamonds. The sparkler bears a striking similarity to the one Eugenie's mother, Sarah Ferguson, was presented with by her ex-husband Prince Andrew, when they became engaged back in 1986 - although Fergie's ring was set with a pink...